NormallyĪlloc_inode will be used to allocate a larger structure whichĬontains a ‘struct inode’ embedded within it. If this function is notĭefined, a simple ‘struct inode’ is allocated. This method is called by alloc_inode() to allocate memory for This means that most methods can block safely. Struct super_operations Īll methods are called without any locks being held, unless otherwise Mount a filesystem which shares the instance between all mountsĪ fill_super() callback implementation has the following arguments: struct super_block *sb Mount a filesystem that is not backed by a device mount_single Mount a filesystem residing on a block device mount_nodev Usually, a filesystem uses one of the generic mount() implementationsĪnd provides a fill_super() callback instead. Super_operations” which describes the next level of the filesystem The most interesting member of the superblock structure that the mount() Point of view is a reference to dentry at the root of (sub)tree to beĪttached creation of new superblock is a common side effect. >mount() may choose to return a subtree of existing filesystem - itĭoesn’t have to create a new one. Super_block accordingly, returning its root dentry to caller. Suitable filesystem image the method creates and initializes struct for block filesystems, dev_name is interpretedĪs block device name, that device is opened and if it contains a The arguments match those of mount(2) and their interpretation depends On failure it should return ERR_PTR(error). An active reference to its superblock must be grabbed and the The mount() method must return the root dentry of the tree requested byĬaller. void *dataĪrbitrary mount options, usually comes as an ASCII string (see
The mount() method has the following arguments: struct file_system_type *fs_typeĭescribes the filesystem, partly initialized by the specific S_lock_key, s_umount_key: lockdep-specific For internal VFS use: you should initialize this to NULL
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